[webkit-dev] WebKit on OpenBSD

James Turner james at bsdgroup.org
Fri May 30 13:51:50 PDT 2008

On Fri, May 30, 2008 at 12:22:54PM -0700, Maciej Stachowiak wrote:
> On May 30, 2008, at 12:15 PM, James Turner wrote:
>> On Fri, May 30, 2008 at 12:13:43PM -0700, Maciej Stachowiak wrote:
>>> On May 30, 2008, at 10:37 AM, James Turner wrote:
>>>> I've spent the last couple days trying to compile WebKit on OpenBSD
>>>> -current.  After adding the signbit function, changing isfinite to
>>>> finite and adding the missing pthread_attr_get_np function, I was
>>>> finally able to get it to compile.
>>>> However, when I try to run the Gtk test browser or midori (another gtk
>>>> browser based on webkit), I receive or core dump whenever I click on any
>>>> part of a webpage or try to navigate to another.  After inspecting the
>>>> core dump with gdb I'm left with this:
>>>> #0  0x0d501dc8 in KJS::Collector::markStackObjectsConservatively () from
>>>> /usr/local/lib/libwebkit-1.0.so.1.0
>>> Sounds like pthread_attr_get_np is not working as expected. It is used to
>>> get the stack base, for purposes of the conservative garbage collector.
>>> - Maciej
>> Thanks, I'll look into my implementation and check it with people who
>> actually know what they're doing!
> pthread_attr_get_np is not really all that important, just any way to get 
> the stack base. If OpenBSD has any function at all that works for that 
> purpose you could just add another branch to the ifdef. Regrettably there 
> is no portable way to do it.
>  - Maciej

So, I looked through OpenBSD's diff stack function and tried using
pthread_stackseg_np like:

stack_t stack;
pthread_stackseg_np(thread, &stack);

But I'm still getting a segfault at the same location.  This again could
be the wrong function to use, but it's the only thing I can find that
looks remotely like it would work :/
James Turner
BSD Group Consulting

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